Blastocystis hominis Infection
(BLASS-toe-SIS-tiss  HOM-in-iss)

Blastocystis hominis is a parasite that is found throughout the world. Little is known about how it is transmitted to humans. Some people who are infected have symptoms and some do not. Treatment is available but is not always effective.

Blastocystis hominis Infection

Blastocystis hominis Infection

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This page last reviewed February 11, 2008

Centers for Disease Control and Prevention
National Center for Infectious Diseases
Division of Parasitic Diseases